Taylor Swift's reputation Tour hit Nashville on Saturday night (Aug. 25), and the singer fully embraced her country roots by choosing to perform one of her best-loved classics: Namely, her 2006 debut single, "Tim McGraw."

Fans, of course, were delighted to hear the strains of the song as it started. But Swift didn't stop at that particular goody. She actually brought out the realTim McGraw—along with his wife, Faith Hill—to sing the tune with her. Watch above to see and hear the magical event.

The crowd went wild with excitement at the unexpected surprise, and Swift herself was effusive in her excitement right back, offering high praise for the city that launched her stardom.

“How do you say thank you to the city of Nashville?” she noted, mid-set. “I came here at 11 years old with a CD of karaoke music and my mom drove me up and down Music Row. I would scamper into record labels and say, ‘Please, call me.’ This is the city where I learned how to write songs. Every single thing I do, I learned in Nashville.”

It's hard to argue that Nashville seems to have taught Swift quite well. According to Billboard, her current tour has netted $191 million to date, which breaks her own previous record set for the highest-grossing U.S. tour by a woman (her 1989 Tour, in 2015). She'll be touring through November this year, wrapping things up in Japan.